DISPOSABLE INJECTION SYRINGE

摘要

DISPOSABLE INJECTION SYRINGE A disposable injection syringe comprises a cylindrical body, which accommodates a piston with a rod. The rod is of a shaped design and is composed of a plurality of cone frustums arranged in series along the rod length. A shaped hollow insert is accommodated in the body concentrically to the rod and encompassing the latter, which insert has joints located along the rod axis and is composed of two parts. The inner surface of the insert follows the outer rod surface, while the outer surface of the insert is formed by the surfaces of a plurality of cone frustums. A washer is interposed between the piston and the insert concentrically to the rod, the side face of the washer being bevelled, while a collar is provided on the inner surface of the body nearby the rear face thereof, one of the collar surfaces being bevelled so as to suit the bevelled surface of the washer.